In order to be a validator in PoS (at least Ethereum's implementation) you need to lock up the funds, so not sure how an exchange would be particularly well-suited for that – they need to keep most of the coins on their books liquid so that the customers who actually own them can quickly trade them.
You don't seem to understand how exchanges work. Locking the funds won't be problem to exchanges. Most of the funds just sit dormant in cold storage for long periods of times. For withdrawals you always use most recent deposits and you minimize the transfers between hot and cold wallet.
Just take a look at any of the account tables. Most of it is in exchange cold wallets. These exchanges will be staking against your interests. It has happened before, it will happen again. Just say no to PoS.
Yeah, in exchanges. Which will ignore the wishes of the actual currency owners, just like happens today.
A vast, vast majority of staking users will not have the required 32 ETH for self-staking, and will be delegating this to third parties. PoS gives power to the exchanges, which should not have this power.
The difference to PoW is that the exchanges can do the staking with very minimal effort. I would guess majority of exchanges give the staking results to customers while taking some % fee.
I don't have any problem with this in general, I don't think it is wrong to do business like that. But I personally prefer PoW because it looks like it naturally separates the mining work from exchanges, creating more decentralized economy.
